Pololu 5V, 9A Step-Down Voltage Regulator D24V90F5

A high-current synchronous buck regulator that accepts 5 V to 38 V in and delivers a fixed 5 V out at up to about 9 A continuous. Typical efficiency is 80–95%, with a switching frequency that adapts to the load to stay efficient across the full range. Built-in reverse-voltage, over-current, short-circuit and thermal protection, plus soft-start and under-voltage lockout. An ENABLE pin gives a low-power shutdown mode and a power-good output flags loss of regulation.

• Input voltage: 5 V to 38 V
• Output: fixed 5 V, 4% accuracy
• Max continuous current: ~9 A typical
• Typical efficiency: 80–95%
• Switching frequency: ~470 kHz
• Protections: reverse-voltage, over-current, short-circuit, thermal shutdown, UVLO, soft-start
• Size: 40.6 × 20.3 × 7.6 mm, four M2 mounting holes
• Pololu item #2866